Mosby, MO 64073 Frost Dates
Frost dates for Mosby, MO, ZIP 64073
The last spring frost here typically falls around 04/19, about 234 days from today. The first fall frost typically arrives around 10/17, about 181 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mosby, not a forecast for this year.
What to do before the first frost
Zone 6a around Mosby has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mosby compares
Mosby's growing season runs about 181 days, ranking 24,738 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 1,001 of 1,129.
Learn more
zone vs. frost date explains why Zone 6a and Mosby's frost date answer different questions, and the frost range explains how to read the range around Mosby's dates instead of trusting one.